[quote name='Neo Nugget' timestamp='1397765740' post='2317840']
Hearts usually have multiple options for credit. Try focusing on a different aspect of it, then kill here and there on the side.
[/quote]

Yes, I thought I phrased my comment so I didnt mean ALL hearts. I meant there are SOME hearts where only a couple of things will progress the heart, or there are few enemies/items around that will progress it. Those hearts have become issues.
I dont have a list yet, as I was with a party just running around on Wednesday when I noticed this.
Still, if it takes 10 mins to finish a heart instead of 4 mins, thats just me being impatient.

One issue I've noticed is kill-stealing has become a thing. Some hearts have very few enemies around, and people are camping on the spawns and killing them immediately for credit. It becomes difficult to do some hearts unless I do the same thing.